A 15GHz Full Duplex System for Microwave Backhauling

This paper proposes a 15 GHz full duplex system for microwave back-hauling. The self-interference components, i.e. the linear component, the non-linear component and the noise component are analyzed in this paper. A feedback chain is built to deal with the non-linearity and phase noise. A new analog cancellation method is proposed with respect to the multi-tap cancellation module in the radio frequency (RF). A smooth window based digital cancellation algorithm is proposed in frequency domain. Simulation results show that the proposed system is robust for different scenarios with 256 QAM. The analog or digital cancellation ability for the proposed 15 GHz full duplex system can reach 50 dB, which is one of the best up to now.